Chuck Swindoll once told the story of a seminary student in Chicago who faced a forgiveness test.
Although he preferred to work in some kind of ministry, the only job he could find was driving a bus on Chicago's south side.
One day a gang of tough teens got on board and refused to pay the fare. After a few days of this, the seminarian spotted a policeman on the corner, stopped the bus, and reported them. The officer made them pay, but then he got off. When the bus rounded a corner, the gang robbed the seminarian and beat him severely.
He pressed charges and the gang was rounded up. They were found guilty. But as soon as the jail sentence was given, the young Christian saw their spiritual need and felt pity for them. So, he asked the judge if he could serve their sentences for them.
The gang members and the judge were dumbfounded. "It's because I forgive you," he explained. His request was denied, but he visited the young men in jail and led several of them to faith in Christ.